Furnace.



W. CROW & J. C. SCHAFFER.

FURNACE.

APPLICATION FILED NOV. 13. 1917.

1,291,425. Patented @11.14, 1919.

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W. CROW & J. C. SCHAFFER.

FUHNACE.

APPLICATION FILED, Nov. 1a, 1917.

1,291,425. Patented .1.111.111,1919

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FURNACE.

APPUcATloN FILED N0v113.1911.

Patented Jan. 14, 1919.

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'WALKER CROW JOI-IN C. SCHAFFER, OF TIFFIN, OHIO.

FURNACE.

Specification of Letters Patent.

Patented Jan. 14, 1919.

Application fuea november 13, 1917. serial No. 201,822.

To all whom t may concern:

IBe it known that we, WALLER CROW and JOHN C. ScHArrnR, each a citizen of the United States of America, residing at Tiffin, Seneca county, Ohio, have invented new and useful Furnaces, of which the following is a specification.

This invention relates to furnaces.

This invention has utility when incorporated in furnaces or burners, especially for delivering determined volume of controlled quality heating gases.

Referring to the drawings:

Figure 1 is a fragmentary side elevation of an embodiment of the invention in coperative combination with a rotary kiln and its cooler;

Fig. 2 is a plan View of the furnace, with parts broken away;

Fig. 3 is a longitudinal section through the furnace of Figs. 1 and 2;

Fig. 4 is a detail View of the ash disposal automatic conveying app-aratus;

Fig. 5 is a section through the ash dump device;

Fig. 6 is a detail view, with parts broken away, of the steam control connection for the ash conveyer system;

Fig. 7 is an end elevation, with parts broken away, of the furnace; and

Fig. 8 is an end elevation of the furnace from the opposite or discharge end, as to the showing in Fig. 7, parts being broken away. The furnace is shown as comprising 'the i housing 1 having outer, intermediate and inner refractory linings backing the arch 2 of the combustion chamber 3, below which is disposed the taper sided ash hopper 4 sepa rated from the combustion chamber by the 'tiltalole grates 5.

The fuel supply or coal storage bin may be connected to the chutes 6 delivering to the stokers 7, which are disposed in a series one along each side of the furnace 1 in opposing pairs, in this instance, instead of staggered. An electric motor 8 (Fig. 7) may actuate one of the stokers 7, and the lower main shaft 9 extend through to drive the alined stokers 7 of its series.

The upper fuel delivery or slow speed shafts 10 of the stokers 7 may carry eccentrics 11 actin through the links 12, angle levers 18, and inks 14 to rock the grates 5, thereby automatically assisting in the working of the ash through the. grates from the combustion chamber to the hopper 4. The stokers 7 discharge into the combustion chamber 3 through the lateral openings 15 of the furnace 1, which openin s 15 are closed by the doors 16, about the stoker discharge spouts 17. Below the stoker discharge spouts, the furnace has openings normally closed by the doors 18, so that access may on occasion be had, .as for relieving grate trouble, and inspection.

The refuse material from combustion delivered to the ash hopper 4, accumulates on the trap doors, and when of sufiicient quantity to overcome the closing action of the adjustable counterweights 20, opens the trap' doors 19. Rigid with each door 19 is the vane 21, so that in the opening the air lock of the disposal system or apparatus in the supplementary hopper 22 is broken, and the gates 19 may readily recover upon discharge yof the ash. matically by the \opening of the doors 19, through the links28, 24, is the valve 25 in the steam line 26 extending to the steam unit 27 for electing removal of the ash from hopper 22 in the duct 28 for travel in the duct 29 (Fig. 4.) rllhe trap doors 19 on the shafts 31 are connected by the segmental gears 32 for simultaneous rocking in opening and closing.

The heating gases from the combustion chamber 3 pass through the large lcross-sectional area opening 33 above 'the bridge wall 34 (Figs. 2, 8) for delivery into the registering opening 85" (Fig. 3) of the rotary kiln or treating member 36, from which the gases expending their heating action or complet ing combustion, may pass by the flue 87.

The heat treated material from the rotary kiln 86 be discharged from the opening 9 35 to fall into the way 88 onto the gates 89 having the threaded rod extensions carry ing the sprocket wheels 41 connected by 'the sprocket chains 42 with the crank carrying sprocket wheels 43, so that there may be accurate control of the discharge from the vkiln 36, or that the flow through the way 38 may 'be regulated to conform to the capacity of the kiln 36, in the removal of treated ma terial to the rotary cooler 44.

The hot material in the rotary cooler 44,V may have cooling air drawn thereover by providing` the chamber 45 in communication with the air discharging end of the cooler 44. Lateral passages 46 from the chamber Connected to be actuated autonels l? may extend to the combustion chainr ber 3 above the gratos 5.. lhe air supply of these ducts may also be regulated by the pull out dampers 5l This mode of utilization of the heat permits operation with maxi inni of economy in this closed-furnacedraft-circulation-systeni. To temper the heat of the combustion chamber as Well as accelerate the draft, valves 52 may control steam lines 53 discharging into the ducts [i8 as injectors. This combuStien-supporting gas supply below the gratcs 5, with the intermittent shifting of grate-carried-material insures rapid and complete combustion of the fuel. i

rfhe shield 54 detachably bolted tothe fun nace reduces the escape of hot gases adjacent the kiln 36, While removal of this shield permits shifting of the furnace l by allowing it to travel on its Wheels 55 along the tracks 56 avvay from the kiln 36, so ready access to the kiln and combustion chamber may be had, as for upkeep through the large registering openings., ln this shifting of Athe furnace l, the materialy chute 38 is opened atits selfclosing joint? (Fig, 3.) 'lhe ash hopper disconnects from the trap doors at the joint 58, (lg. 3) and the hot air ducts 48, 50, disconnnect at the joints 59, (lligsu 3, 7) in the out of use shifting of the furnace lu lilith the furnace in operation, it will maintain a desired quality and volume-heatinggasfsupply With a minimum of attention and a .maximum of fuel economy.

instead of the production of an oxidiz-I ing darne or oxidizing combustion gases for introduction through the large discharge opening of the rotary kiln, the heating gases may `have their combustion proportioned to fall more or less short of com plete combustion, thereby retarding the complete combustion until along in the kiln thereby distributing the heat and tempering the initial intensity for a'given supply or volume. 'lhis delicacy of adjustment, even up to full combustion in the combustion chamber 2 may be regulated not only by the heated air supplies through thel ducts 50, but there may be supplemental regulation thereof to permit intake of unheated air through the openings inthe dangeprojection 6l from the ducts 50, Ylf`he cap 62 (Figs. 2, 3) may be rotated to bring its openings 63 along its cylindrical portion more or lessout of registry with the openings in the pipe 50 to effect this cooling air control. Further, the duct 6d may enter the combustion chamber 2 adjacent the bridge Wall 34,-, to temper or lower the heat intensity at the kiln entrance, by the control 60, (il, 52, 63, or for unnamed-heated is a ternperature` checking up means as-v sisting in rising the conditions it is desired prevail at the furnace as Well as through the kiln, pyronieters 65 are installed.

What is claimed and it is desired to secure by Letters Patent is;

l. i furnace provided with a combustion chamber, a lateral fuel receiving open.- ing therefor', an ash hopper, grates separatthe combustion chamber from the ash hopper, a stoker disposed for delivering fuel into the combustion chamber through the fuel receiving opening, said Stoker being provided with means for actuating the grates, and an automatic dump for the hopper provided with a conveyer and ccntrolling rneans therefor for removing the dumped material,

9i., A furnace provided with a combustion chamber, tivo series of lateral fuel receiving openings therefor, stokers disposed at said openings, an ash hopper, gratos separating the hopper from the combustion chamber, and driving means for the stokers connected to actuate the grates.

3, ll shiftable furnace including a sup porting Way along which the furnace may travel, said furnace including a combustion chamber provided With a heating gas discharge, and a bridge Wall between the chamber and said discharge inclined to defleet gas doi/v upwardly from the discharge.

d. A shiftable furnace including a supporting track Way therebelovv along Which the furnace may travel, said furnace being provided with a combustion chamber having a heating gas discharge disposed in the line of said Way.

5. ln an installation including a treating chamber member provided with a heating gas-receiving-opening, a furnace shiftable to position adjacent said opening, said furnace being provided with a combustion chamber having a discharge opening for registering with the treating member opening, and an intertting shield member shiftable with the furnace permitting rotation of the member as to the furnace When the furnace and member openings are in register.

6, lin an installation including a treating A member provided with a heating gas receivn ing opening, a furnace provided with a combustion chamber having a discharge opening into said receiving opening, a cooling member for material treated in the treating member, and a plurality of ducts for creating circulation from the coolin,"j member to the combustion chamber and delivering heated combustionsupporting gases to the combustion chamber., f

if. Tin an installation including a treating chamber member and a cooling chamber member to which the treating chamber member may deliver heated material for cooling, a furnace provided with a combustion chamber connected to supply heating gases to the treating member, gratesvin sald furnace below the combustion chamber, and controllable-duct-connection from' the cooling member to above and below the grates for p 10 supplying combustion-supporting-heatedgases to the furnace 8. In an lnstallation including a rotary kiln having its dischar e end o en approximating the diameter o the ki n, a furnace provided with a combustion chamber registering With the kiln discharge end to provide heating gas iow into the kiln through out the cross-sectional area-,of the kiln discharge end, said furnace shiftable toward -and from the kiln and having ardischarge Wa for thekiln.

15h witness whereof we aix our signatures.

- WALLER CROW. v

JOHN C.- SCHAFFER. 

